JavaScript program for array methods

 

24 Array methods but in this example only 23

Last is map method which is covered separately. 

var a=["Gaurav","Aditya", "Himanshu", "Divyansh"];

var b=["Sanjay","Aman"];

var c=["neha","mahima"];

function checkadult(age){

    return age>=18;

}

document.write(a+"<--normal<br>");

a.sort();

document.write(a+"<--sort()<br>");

a.reverse();

document.write(a+"<--reverse()<br>");

a.pop();

document.write(a+"<--pop()<br>");

a.push("Rahul");

document.write(a+"<--push()<br>");

a.shift();

document.write(a+"<--shift()<br>");

a.unshift("Ajay");

document.write(a+"<--unshift()<br>");

var ar=a.concat("Sonu");

document.write(ar+"<--concat()<br>");

var arr=ar.concat(b);

document.write(arr+"<--concat()<br>");

var arrr=ar.concat(b,c);

document.write(arrr+"<--concat()<br>");

var join=arr.join("/");

document.write(join+"<--join()<br>");

var slice=arrr.slice(1,3);

document.write(slice+"<--slice()<br>");

var slice=arrr.slice(3);

document.write(slice+"<--slice()<br>");

var slice=arrr.slice(-2);

document.write(slice+"<--slice()<br>");

var slice=arrr.slice(-5,-3);

document.write(slice+"<--slice()<br>");

slice.splice(1,0,"Gaurav", "charchit","Gaurav");

document.write(slice+"<--splice()<br>");

var check=Array.isArray(slice);

document.write(check+"<--isArray()<br>");

var index=slice.indexOf("Gaurav",2);

document.write(index+"<--indexOf()<br>");

var index=slice. lastIndexOf("Gaurav",2);

document.write(index+"<--lastIndexOf()<br>");

var includes = slice.includes("Gaurav");

document.write(includes+"<--includes()<br>");

var ages=[12,20,13,18];

document.write(ages+"<br>");

var b=ages.some(checkadult);

document.write(b+"<--some()<br>");

var b=ages.every(checkadult);

document.write(b+"<--every()<br>");

var b=ages.find(checkadult);

document.write(b+"<--find()<br>");

var b=ages.findIndex(checkadult);

document.write(b+"<--findIndex()<br>");

var b=ages.filter(checkadult);

document.write(b+"<--filter()<br>");

ages.toString();

document.write(ages+"<--toString()<br>");

document.write(ages.valueOf()+"<--valueOf()<br>");

ages.fill("Ram");

document.write(ages+"<--fill()<br>")

slice.forEach(loop);

function loop(value,index){

    document.write(index+":"+value+"<--for Each()<br>")}

Output